如果解析后的上下文变量内容为空，则不会发生替换，并且变量名称在查询字符串中保持不变(包括“%”符号)。

If the resolved context variable content is null, no replacement occurs and the variable name remains unchanged in the query string (including the "%" signs).

youdao

随后又使用连接后的字符串替换这些字符串。

It then replaces them with the concatenated string.

youdao

那个函数则接收匹配到的数组作为参数，然后返回一个修改后的字符串作为替换。

This function receives the match array as a parameter and returns a modified string that is used as a replacement.

youdao

那个函数则接收匹配到的数组作为参数，然后返回一个修改后的字符串作为替换。

This function receives the match array as a parameter and returns a modified string that is used as a replacement.

youdao